Merge pull request #1 from BarthPaleologue/HPBD

HXPbd Physics Engine

.gitignore

@@ -5,7 +5,6 @@
 *.slo
 *.lo
 *.o
-*.obj
 
 # Precompiled Headers
 *.gch

CMakeLists.txt

@@ -12,33 +12,38 @@ file(GLOB SRCS ./*.h ./*.cpp
         core/materials/*.cpp core/materials/*.h
         core/utils/*.cpp core/utils/*.h
         core/physics/*.cpp core/physics/*.h
+        core/shadows/*.cpp core/shadows/*.h
+        imgui/*.cpp imgui/*.h
 )
-add_executable(featherGL ${SRCS}
-        core/physics/DistanceConstraint.h
-        core/physics/BendConstraint.h
-        core/physics/SelfCollisionConstraint.h
-        core/physics/ClothBalloonConstraint.h
-        core/physics/Cloth.h
-        core/physics/PhysicsBody.h
-        core/physics/FixedConstraint.h
-        core/utils/ComputeShader.h
-        core/shadows/ShadowRenderer.h
-        core/materials/DepthMaterial.h
-        core/meshes/ScreenQuad.h
-        core/materials/PbrMaterial.h
+
+
+add_executable(featherGL ${SRCS} ${IMGUI_SRC}
+        core/physics/UniformAccelerationField.h
+        core/physics/DihedralBendConstraint.h
+        core/physics/ConstraintHelper.h
+        core/Renderable.h
+        core/AABB.h
+        core/AABBHelper.h
+        core/physics/GlobalVolumeConstraint.h
+        core/PickResult.h
+        core/physics/PhysicsBodyHelper.h
 )
 
 file(COPY assets DESTINATION ${CMAKE_BINARY_DIR})
 
 find_package(glfw3 REQUIRED)
 message(STATUS "Found GLFW3")
-target_link_libraries(${PROJECT_NAME} glfw)
 
 find_package(glm REQUIRED)
 message(STATUS "GLM included")
 
+target_link_libraries(${PROJECT_NAME} glfw glm::glm)
+
 target_sources(${PROJECT_NAME} PRIVATE glad/src/glad.c)
 target_include_directories(${PROJECT_NAME} PRIVATE glad/include/)
 
 target_sources(${PROJECT_NAME} PRIVATE Eigen/Dense)
 target_include_directories(${PROJECT_NAME} PRIVATE Eigen/)
+
+# Set optimization level to -O3
+target_compile_options(${PROJECT_NAME} PRIVATE -O3)

CelestialBody.cpp

@@ -6,7 +6,7 @@
 
 CelestialBody::CelestialBody(const char *name, float radius, float rotationPeriod, float orbitPeriod, float orbitRadius,
                              std::shared_ptr<BlinnPhongMaterial> material, Scene &scene) :
-        _mesh(MeshBuilder::makeSphere(name, scene, 32)) {
+        _mesh(MeshBuilder::makeUvSphere(name, scene, 32)) {
     _mesh->transform()->setScale(radius);
     _mesh->setMaterial(material);
     _rotationPeriod = rotationPeriod;

README.md

@@ -1,11 +1,60 @@
 # Feather
 
-Feather is a small opengl engine written in c++ inspired by BabylonJS aiming at easily create complex playgrounds for simulations.
+Feather is a small OpenGL engine written in C++ developed for fun and learning purposes. The API is loosely inspired by BabylonJS.
 
-It features a demo of a small simple solar system made using the engine.
+![HXPBD](img.png)
 
-![Many Point Lights](./coverImages/cover0.png)
+## Features
 
-<img src="./coverImages/cover3.png">
+### General
 
-<img src="./coverImages/cover4.png">
+- Blinn-Phong shading
+- PBR shading
+- Normal mapping
+- Shadow Mapping
+- CPU mouse picking
+- Post-processing effects
+- Compute shaders
+- Raw `.obj` file loading
+- Up to 128 point lights by default
+- ImGui integration
+
+### Physics
+
+The entire code for the physics engine is available in the `core/physics` directory. It is based on the Position-Based Dynamics (PBD) method, and includes the following features:
+
+- XPBD soft body simulation
+- HPBD multigrid solver for XPBD
+- Distance constraints
+- Fast and Dihedral bending constraints
+- Tetrahedral volume constraints
+- Global volume constraints
+- Collision constraints with friction
+- Collision LoD using HPBD
+- Constraints and bounding boxes helpers
+
+### How to build
+
+#### Dependencies
+
+Feather uses GLFW3 for window management and input, as well as GLM for math operations.
+
+They can be installed on any Debian-based system using the following command:
+
+```bash
+sudo apt install libglfw3-dev libglm-dev
+```
+
+#### CMake
+
+Feather uses CMake as its build system. To build the project, you can use the following commands:
+
+```bash
+mkdir build
+cd build
+cmake ..
+make
+```
+
+
+![Many Point Lights](./coverImages/cover0.png)